/mandos/trunk : revision 827

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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from future_builtins import *

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.7.5"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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logger.debug("Unknown state: %r", state)

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.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = "3.3.0"

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def __init__(self):

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# Need to use class name "GnuTLS" here, since this method is

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# called before the assignment to the "gnutls" global variable

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# happens.

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if GnuTLS.check_version(self._need_version) is None:

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raise GnuTLS.Error("Needs GnuTLS {} or later"

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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# all from the gnutls/gnutls.h C header file.

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

475

_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

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certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

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('size', ctypes.c_uint)]

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class openpgp_crt_int(ctypes.Structure):

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_fields_ = []

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openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

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credentials_type_t = ctypes.c_int

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transport_ptr_t = ctypes.c_void_p

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close_request_t = ctypes.c_int

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# Exceptions

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class Error(Exception):

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# We need to use the class name "GnuTLS" here, since this

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# exception might be raised from within GnuTLS.__init__,

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# which is called before the assignment to the "gnutls"

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# global variable has happened.

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def __init__(self, message = None, code = None, args=()):

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# Default usage is by a message string, but if a return

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# code is passed, convert it to a string with

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# gnutls.strerror()

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self.code = code

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if message is None and code is not None:

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message = GnuTLS.strerror(code)

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return super(GnuTLS.Error, self).__init__(

508

message, *args)

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class CertificateSecurityError(Error):

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pass

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# Classes

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class Credentials(object):

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def __init__(self):

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self._c_object = gnutls.certificate_credentials_t()

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gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

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self.type = gnutls.CRD_CERTIFICATE

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def __del__(self):

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gnutls.certificate_free_credentials(self._c_object)

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class ClientSession(object):

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def __init__(self, socket, credentials = None):

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self._c_object = gnutls.session_t()

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gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

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gnutls.set_default_priority(self._c_object)

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gnutls.transport_set_ptr(self._c_object, socket.fileno())

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gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

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gnutls.credentials_set(self._c_object, credentials.type,

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ctypes.cast(credentials._c_object,

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ctypes.c_void_p))

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self.credentials = credentials

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def __del__(self):

541

gnutls.deinit(self._c_object)

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def handshake(self):

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return gnutls.handshake(self._c_object)

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546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

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data[-data_len:],

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data_len)

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def bye(self):

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return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

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# Error handling functions

558

def _error_code(result):

559

"""A function to raise exceptions on errors, suitable

560

for the 'restype' attribute on ctypes functions"""

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

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567

def _retry_on_error(result, func, arguments):

568

"""A function to retry on some errors, suitable

569

for the 'errcheck' attribute on ctypes functions"""

570

while result < 0:

571

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

572

return _error_code(result)

573

result = func(*arguments)

574

return result

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576

# Unless otherwise indicated, the function declarations below are

577

# all from the gnutls/gnutls.h C header file.

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579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

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ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

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init = _library.gnutls_init

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init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

587

init.restype = _error_code

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589

set_default_priority = _library.gnutls_set_default_priority

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set_default_priority.argtypes = [session_t]

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set_default_priority.restype = _error_code

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593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

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599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

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certificate_allocate_credentials.argtypes = [

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ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

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605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

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ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

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ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

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625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

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634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

# All the function declarations below are from gnutls/openpgp.h

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

# Create the global "gnutls" object, simulating a module

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

"""This function is meant to be called by multiprocessing.Process

701

702

This function runs func(*args, **kwargs), and writes the resulting

703

return value on the provided multiprocessing.Connection.

704

"""

705

connection.send(func(*args, **kwargs))

706

connection.close()

414

707

415

708

class Client(object):

416

709

"""A representation of a client host served by this server.

422

715

checker: subprocess.Popen(); a running checker process used

423

716

to see if the client lives.

424

717

'None' if no process is running.

425

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

426

719

checker_command: string; External command which is run to check

427

720

if client lives. %() expansions are done at

428

721

runtime with vars(self) as dict, so that for

429

722

instance %(name)s can be used in the command.

430

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

431

724

created: datetime.datetime(); (UTC) object creation

432

725

client_structure: Object describing what attributes a client has

433

726

and is used for storing the client at exit

434

727

current_checker_command: string; current running checker_command

435

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

436

729

enabled: bool()

437

730

fingerprint: string (40 or 32 hexadecimal digits); used to

438

731

uniquely identify the client

443

736

last_checker_status: integer between 0 and 255 reflecting exit

444

737

status of last checker. -1 reflects crashed

445

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

446

741

last_enabled: datetime.datetime(); (UTC) or None

447

742

name: string; from the config file, used in log messages and

448

743

D-Bus identifiers

590

885

if not quiet:

591

886

logger.info("Disabling client %s", self.name)

592

887

if getattr(self, "disable_initiator_tag", None) is not None:

593

gobject.source_remove(self.disable_initiator_tag)

888

GObject.source_remove(self.disable_initiator_tag)

594

889

self.disable_initiator_tag = None

595

890

self.expires = None

596

891

if getattr(self, "checker_initiator_tag", None) is not None:

597

gobject.source_remove(self.checker_initiator_tag)

892

GObject.source_remove(self.checker_initiator_tag)

598

893

self.checker_initiator_tag = None

599

894

self.stop_checker()

600

895

self.enabled = False

601

896

if not quiet:

602

897

self.send_changedstate()

603

# Do not run this again if called by a gobject.timeout_add

898

# Do not run this again if called by a GObject.timeout_add

604

899

return False

605

900

606

901

def __del__(self):

610

905

# Schedule a new checker to be started an 'interval' from now,

611

906

# and every interval from then on.

612

907

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

614

self.checker_initiator_tag = gobject.timeout_add(

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

615

910

int(self.interval.total_seconds() * 1000),

616

911

self.start_checker)

617

912

# Schedule a disable() when 'timeout' has passed

618

913

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

620

self.disable_initiator_tag = gobject.timeout_add(

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

621

916

int(self.timeout.total_seconds() * 1000), self.disable)

622

917

# Also start a new checker *right now*.

623

918

self.start_checker()

624

919

625

def checker_callback(self, pid, condition, command):

920

def checker_callback(self, source, condition, connection,

921

command):

626

922

"""The checker has completed, so take appropriate actions."""

627

923

self.checker_callback_tag = None

628

924

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

631

932

if self.last_checker_status == 0:

632

933

logger.info("Checker for %(name)s succeeded",

633

934

vars(self))

636

937

logger.info("Checker for %(name)s failed", vars(self))

637

938

else:

638

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

639

941

logger.warning("Checker for %(name)s crashed?",

640

942

vars(self))

943

return False

641

944

642

945

def checked_ok(self):

643

946

"""Assert that the client has been seen, alive and well."""

644

947

self.last_checked_ok = datetime.datetime.utcnow()

645

948

self.last_checker_status = 0

949

self.last_checker_signal = None

646

950

self.bump_timeout()

647

951

648

952

def bump_timeout(self, timeout=None):

650

954

if timeout is None:

651

955

timeout = self.timeout

652

956

if self.disable_initiator_tag is not None:

653

gobject.source_remove(self.disable_initiator_tag)

957

GObject.source_remove(self.disable_initiator_tag)

654

958

self.disable_initiator_tag = None

655

959

if getattr(self, "enabled", False):

656

self.disable_initiator_tag = gobject.timeout_add(

960

self.disable_initiator_tag = GObject.timeout_add(

657

961

int(timeout.total_seconds() * 1000), self.disable)

658

962

self.expires = datetime.datetime.utcnow() + timeout

659

963

674

978

# than 'timeout' for the client to be disabled, which is as it

675

979

# should be.

676

980

677

# If a checker exists, make sure it is not a zombie

678

try:

679

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

680

except AttributeError:

681

pass

682

except OSError as error:

683

if error.errno != errno.ECHILD:

684

raise

685

else:

686

if pid:

687

logger.warning("Checker was a zombie")

688

gobject.source_remove(self.checker_callback_tag)

689

self.checker_callback(pid, status,

690

self.current_checker_command)

981

if self.checker is not None and not self.checker.is_alive():

982

logger.warning("Checker was not alive; joining")

983

self.checker.join()

984

self.checker = None

691

985

# Start a new checker if needed

692

986

if self.checker is None:

693

987

# Escape attributes for the shell

702

996

exc_info=error)

703

997

return True # Try again later

704

998

self.current_checker_command = command

705

try:

706

logger.info("Starting checker %r for %s", command,

707

self.name)

708

# We don't need to redirect stdout and stderr, since

709

# in normal mode, that is already done by daemon(),

710

# and in debug mode we don't want to. (Stdin is

711

# always replaced by /dev/null.)

712

# The exception is when not debugging but nevertheless

713

# running in the foreground; use the previously

714

# created wnull.

715

popen_args = {}

716

if (not self.server_settings["debug"]

717

and self.server_settings["foreground"]):

718

popen_args.update({"stdout": wnull,

719

"stderr": wnull })

720

self.checker = subprocess.Popen(command,

721

close_fds=True,

722

shell=True,

723

cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = gobject.child_watch_add(

730

self.checker.pid, self.checker_callback, data=command)

731

# The checker may have completed before the gobject

732

# watch was added. Check for this.

733

try:

734

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

735

except OSError as error:

736

if error.errno == errno.ECHILD:

737

# This should never happen

738

logger.error("Child process vanished",

739

exc_info=error)

740

return True

741

raise

742

if pid:

743

gobject.source_remove(self.checker_callback_tag)

744

self.checker_callback(pid, status, command)

745

# Re-run this periodically if run by gobject.timeout_add

999

logger.info("Starting checker %r for %s", command,

1000

self.name)

1001

# We don't need to redirect stdout and stderr, since

1002

# in normal mode, that is already done by daemon(),

1003

# and in debug mode we don't want to. (Stdin is

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

args = (pipe[1], subprocess.call, command),

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

pipe[0].fileno(), GObject.IO_IN,

1023

self.checker_callback, pipe[0], command)

1024

# Re-run this periodically if run by GObject.timeout_add

746

1025

return True

747

1026

748

1027

def stop_checker(self):

749

1028

"""Force the checker process, if any, to stop."""

750

1029

if self.checker_callback_tag:

751

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

752

1031

self.checker_callback_tag = None

753

1032

if getattr(self, "checker", None) is None:

754

1033

return

755

1034

logger.debug("Stopping checker for %(name)s", vars(self))

756

try:

757

self.checker.terminate()

758

#time.sleep(0.5)

759

#if self.checker.poll() is None:

760

# self.checker.kill()

761

except OSError as error:

762

if error.errno != errno.ESRCH: # No such process

763

raise

1035

self.checker.terminate()

764

1036

self.checker = None

765

1037

766

1038

830

1102

access="r")

831

1103

def Property_dbus_property(self):

832

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

833

1107

"""

834

1108

835

1109

def decorator(func):

857

1131

pass

858

1132

859

1133

860

class DBusObjectWithProperties(dbus.service.Object):

861

"""A D-Bus object with properties.

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

862

1136

863

Classes inheriting from this can use the dbus_service_property

864

decorator to expose methods as D-Bus properties. It exposes the

865

standard Get(), Set(), and GetAll() methods on the D-Bus.

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

866

1139

"""

867

1140

868

1141

@staticmethod

884

1157

for name, athing in

885

1158

inspect.getmembers(cls, self._is_dbus_thing(thing)))

886

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

xmlstring = dbus.service.Object.Introspect(self, object_path,

1170

connection)

1171

try:

1172

document = xml.dom.minidom.parseString(xmlstring)

1173

1174

for if_tag in document.getElementsByTagName("interface"):

1175

# Add annotation tags

1176

for typ in ("method", "signal"):

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

if (name == tag.getAttribute("name")

1182

and prop._dbus_interface

1183

== if_tag.getAttribute("name")):

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

if name == if_tag.getAttribute("name")

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

for cn in if_tag.getElementsByTagName("method"):

1208

if cn.getAttribute("name") == "Introspect":

1209

for arg in cn.getElementsByTagName("arg"):

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

xmlstring = document.toxml("utf-8")

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

logger.error("Failed to override Introspection method",

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1224

"""A D-Bus object with properties.

1225

1226

Classes inheriting from this can use the dbus_service_property

1227

decorator to expose methods as D-Bus properties. It exposes the

1228

standard Get(), Set(), and GetAll() methods on the D-Bus.

1229

"""

1230

887

1231

def _get_dbus_property(self, interface_name, property_name):

888

1232

"""Returns a bound method if one exists which is a D-Bus

889

1233

property with the specified name and interface.

899

1243

raise DBusPropertyNotFound("{}:{}.{}".format(

900

1244

self.dbus_object_path, interface_name, property_name))

901

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

"""Get a sequence of all interfaces supported by an object"""

1249

return (name for name in set(getattr(getattr(x, attr),

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

902

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

903

1256

in_signature="ss",

904

1257

out_signature="v")

974

1327

975

1328

Inserts property tags and interface annotation tags.

976

1329

"""

977

xmlstring = dbus.service.Object.Introspect(self, object_path,

978

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

979

1333

try:

980

1334

document = xml.dom.minidom.parseString(xmlstring)

981

1335

994

1348

if prop._dbus_interface

995

1349

== if_tag.getAttribute("name")):

996

1350

if_tag.appendChild(tag)

997

# Add annotation tags

998

for typ in ("method", "signal", "property"):

999

for tag in if_tag.getElementsByTagName(typ):

1000

annots = dict()

1001

for name, prop in (self.

1002

_get_all_dbus_things(typ)):

1003

if (name == tag.getAttribute("name")

1004

and prop._dbus_interface

1005

== if_tag.getAttribute("name")):

1006

annots.update(getattr(

1007

prop, "_dbus_annotations", {}))

1008

for name, value in annots.items():

1009

ann_tag = document.createElement(

1010

"annotation")

1011

ann_tag.setAttribute("name", name)

1012

ann_tag.setAttribute("value", value)

1013

tag.appendChild(ann_tag)

1014

# Add interface annotation tags

1015

for annotation, value in dict(

1016

itertools.chain.from_iterable(

1017

annotations().items()

1018

for name, annotations

1019

in self._get_all_dbus_things("interface")

1020

if name == if_tag.getAttribute("name")

1021

)).items():

1022

ann_tag = document.createElement("annotation")

1023

ann_tag.setAttribute("name", annotation)

1024

ann_tag.setAttribute("value", value)

1025

if_tag.appendChild(ann_tag)

1351

# Add annotation tags for properties

1352

for tag in if_tag.getElementsByTagName("property"):

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

if (name == tag.getAttribute("name")

1357

and prop._dbus_interface

1358

== if_tag.getAttribute("name")):

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

1026

1367

# Add the names to the return values for the

1027

1368

# "org.freedesktop.DBus.Properties" methods

1028

1369

if (if_tag.getAttribute("name")

1046

1387

exc_info=error)

1047

1388

return xmlstring

1048

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

"""A D-Bus object with an ObjectManager.

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

Note: No signals are sent automatically; they must be sent

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

out_signature = "a{oa{sa{sv}}}")

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

signature = "oa{sa{sv}}")

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

document = xml.dom.minidom.parseString(xmlstring)

1436

1437

for if_tag in document.getElementsByTagName("interface"):

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

for cn in if_tag.getElementsByTagName("method"):

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

for arg in cn.getElementsByTagName("arg"):

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

xmlstring = document.toxml("utf-8")

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

logger.error("Failed to override Introspection method",

1456

exc_info = error)

1457

return xmlstring

1049

1458

1050

1459

def datetime_to_dbus(dt, variant_level=0):

1051

1460

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1098

1507

interface_names.add(alt_interface)

1099

1508

# Is this a D-Bus signal?

1100

1509

if getattr(attribute, "_dbus_is_signal", False):

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))

1106

["func"].cell_contents)

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

1514

zip(attribute.func_code.co_freevars,

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

1107

1519

# Create a new, but exactly alike, function

1108

1520

# object, and decorate it to be a new D-Bus signal

1109

1521

# with the alternate D-Bus interface name

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1110

1536

new_function = (dbus.service.signal(

1111

alt_interface, attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1118

1539

# Copy annotations, if any

1119

1540

try:

1120

1541

new_function._dbus_annotations = dict(

1130

1551

func1 and func2 to the "call_both" function

1131

1552

outside of its arguments"""

1132

1553

1554

@functools.wraps(func2)

1133

1555

def call_both(*args, **kwargs):

1134

1556

"""This function will emit two D-Bus

1135

1557

signals by calling func1 and func2"""

1136

1558

func1(*args, **kwargs)

1137

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

for name, attr in inspect.getmembers(func2):

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1138

1564

1139

1565

return call_both

1140

1566

# Create the "call_both" function and add it to

1343

1769

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1344

1770

Client.__del__(self, *args, **kwargs)

1345

1771

1346

def checker_callback(self, pid, condition, command,

1347

*args, **kwargs):

1348

self.checker_callback_tag = None

1349

self.checker = None

1350

if os.WIFEXITED(condition):

1351

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

connection, command, *args, **kwargs):

1774

ret = Client.checker_callback(self, source, condition,

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1352

1779

# Emit D-Bus signal

1353

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1354

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1355

1783

dbus.String(command))

1356

1784

else:

1357

1785

# Emit D-Bus signal

1358

1786

self.CheckerCompleted(dbus.Int16(-1),

1359

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1360

1791

dbus.String(command))

1361

1362

return Client.checker_callback(self, pid, condition, command,

1363

*args, **kwargs)

1792

return ret

1364

1793

1365

1794

def start_checker(self, *args, **kwargs):

1366

1795

old_checker_pid = getattr(self.checker, "pid", None)

1378

1807

1379

1808

def approve(self, value=True):

1380

1809

self.approved = value

1381

gobject.timeout_add(int(self.approval_duration.total_seconds()

1810

GObject.timeout_add(int(self.approval_duration.total_seconds()

1382

1811

* 1000), self._reset_approved)

1383

1812

self.send_changedstate()

1384

1813

1441

1870

self.checked_ok()

1442

1871

1443

1872

# Enable - method

1873

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1444

1874

@dbus.service.method(_interface)

1445

1875

def Enable(self):

1446

1876

"D-Bus method"

1447

1877

self.enable()

1448

1878

1449

1879

# StartChecker - method

1880

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1450

1881

@dbus.service.method(_interface)

1451

1882

def StartChecker(self):

1452

1883

"D-Bus method"

1453

1884

self.start_checker()

1454

1885

1455

1886

# Disable - method

1887

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1456

1888

@dbus.service.method(_interface)

1457

1889

def Disable(self):

1458

1890

"D-Bus method"

1459

1891

self.disable()

1460

1892

1461

1893

# StopChecker - method

1894

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1462

1895

@dbus.service.method(_interface)

1463

1896

def StopChecker(self):

1464

1897

self.stop_checker()

1500

1933

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1501

1934

1502

1935

# Name - property

1936

@dbus_annotations(

1937

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1503

1938

@dbus_service_property(_interface, signature="s", access="read")

1504

1939

def Name_dbus_property(self):

1505

1940

return dbus.String(self.name)

1506

1941

1507

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1508

1945

@dbus_service_property(_interface, signature="s", access="read")

1509

1946

def Fingerprint_dbus_property(self):

1510

1947

return dbus.String(self.fingerprint)

1519

1956

self.host = str(value)

1520

1957

1521

1958

# Created - property

1959

@dbus_annotations(

1960

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1522

1961

@dbus_service_property(_interface, signature="s", access="read")

1523

1962

def Created_dbus_property(self):

1524

1963

return datetime_to_dbus(self.created)

1585

2024

if (getattr(self, "disable_initiator_tag", None)

1586

2025

is None):

1587

2026

return

1588

gobject.source_remove(self.disable_initiator_tag)

1589

self.disable_initiator_tag = gobject.timeout_add(

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

1590

2029

int((self.expires - now).total_seconds() * 1000),

1591

2030

self.disable)

1592

2031

1612

2051

return

1613

2052

if self.enabled:

1614

2053

# Reschedule checker run

1615

gobject.source_remove(self.checker_initiator_tag)

1616

self.checker_initiator_tag = gobject.timeout_add(

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

1617

2056

value, self.start_checker)

1618

2057

self.start_checker() # Start one now, too

1619

2058

1639

2078

self.stop_checker()

1640

2079

1641

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2083

"org.freedesktop.DBus.Deprecated": "true"})

1642

2084

@dbus_service_property(_interface, signature="o", access="read")

1643

2085

def ObjectPath_dbus_property(self):

1644

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1645

2087

1646

2088

# Secret = property

2089

@dbus_annotations(

2090

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2091

"invalidates"})

1647

2092

@dbus_service_property(_interface,

1648

2093

signature="ay",

1649

2094

access="write",

1659

2104

self._pipe = child_pipe

1660

2105

self._pipe.send(('init', fpr, address))

1661

2106

if not self._pipe.recv():

1662

raise KeyError()

2107

raise KeyError(fpr)

1663

2108

1664

2109

def __getattribute__(self, name):

1665

2110

if name == '_pipe':

1695

2140

logger.debug("Pipe FD: %d",

1696

2141

self.server.child_pipe.fileno())

1697

2142

1698

session = gnutls.connection.ClientSession(

1699

self.request, gnutls.connection .X509Credentials())

1700

1701

# Note: gnutls.connection.X509Credentials is really a

1702

# generic GnuTLS certificate credentials object so long as

1703

# no X.509 keys are added to it. Therefore, we can use it

1704

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1705

2144

1706

2145

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1707

2146

# "+AES-256-CBC", "+SHA1",

1711

2150

priority = self.server.gnutls_priority

1712

2151

if priority is None:

1713

2152

priority = "NORMAL"

1714

gnutls.library.functions.gnutls_priority_set_direct(

1715

session._c_object, priority, None)

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1716

2155

1717

2156

# Start communication using the Mandos protocol

1718

2157

# Get protocol number

1728

2167

# Start GnuTLS connection

1729

2168

try:

1730

2169

session.handshake()

1731

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1732

2171

logger.warning("Handshake failed: %s", error)

1733

2172

# Do not run session.bye() here: the session is not

1734

2173

# established. Just abandon the request.

1740

2179

try:

1741

2180

fpr = self.fingerprint(

1742

2181

self.peer_certificate(session))

1743

except (TypeError,

1744

gnutls.errors.GNUTLSError) as error:

2182

except (TypeError, gnutls.Error) as error:

1745

2183

logger.warning("Bad certificate: %s", error)

1746

2184

return

1747

2185

logger.debug("Fingerprint: %s", fpr)

1805

2243

else:

1806

2244

delay -= time2 - time

1807

2245

1808

sent_size = 0

1809

while sent_size < len(client.secret):

1810

try:

1811

sent = session.send(client.secret[sent_size:])

1812

except gnutls.errors.GNUTLSError as error:

1813

logger.warning("gnutls send failed",

1814

exc_info=error)

1815

return

1816

logger.debug("Sent: %d, remaining: %d", sent,

1817

len(client.secret) - (sent_size

1818

+ sent))

1819

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1820

2252

1821

2253

logger.info("Sending secret to %s", client.name)

1822

2254

# bump the timeout using extended_timeout

1830

2262

client.approvals_pending -= 1

1831

2263

try:

1832

2264

session.bye()

1833

except gnutls.errors.GNUTLSError as error:

2265

except gnutls.Error as error:

1834

2266

logger.warning("GnuTLS bye failed",

1835

2267

exc_info=error)

1836

2268

1838

2270

def peer_certificate(session):

1839

2271

"Return the peer's OpenPGP certificate as a bytestring"

1840

2272

# If not an OpenPGP certificate...

1841

if (gnutls.library.functions.gnutls_certificate_type_get(

1842

session._c_object)

1843

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1844

# ...do the normal thing

1845

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1846

2277

list_size = ctypes.c_uint(1)

1847

cert_list = (gnutls.library.functions

1848

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1849

2279

(session._c_object, ctypes.byref(list_size)))

1850

2280

if not bool(cert_list) and list_size.value != 0:

1851

raise gnutls.errors.GNUTLSError("error getting peer"

1852

" certificate")

2281

raise gnutls.Error("error getting peer certificate")

1853

2282

if list_size.value == 0:

1854

2283

return None

1855

2284

cert = cert_list[0]

1859

2288

def fingerprint(openpgp):

1860

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1861

2290

# New GnuTLS "datum" with the OpenPGP public key

1862

datum = gnutls.library.types.gnutls_datum_t(

2291

datum = gnutls.datum_t(

1863

2292

ctypes.cast(ctypes.c_char_p(openpgp),

1864

2293

ctypes.POINTER(ctypes.c_ubyte)),

1865

2294

ctypes.c_uint(len(openpgp)))

1866

2295

# New empty GnuTLS certificate

1867

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1868

gnutls.library.functions.gnutls_openpgp_crt_init(

1869

ctypes.byref(crt))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1870

2298

# Import the OpenPGP public key into the certificate

1871

gnutls.library.functions.gnutls_openpgp_crt_import(

1872

crt, ctypes.byref(datum),

1873

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2299

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2300

gnutls.OPENPGP_FMT_RAW)

1874

2301

# Verify the self signature in the key

1875

2302

crtverify = ctypes.c_uint()

1876

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1877

crt, 0, ctypes.byref(crtverify))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1878

2305

if crtverify.value != 0:

1879

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1880

raise gnutls.errors.CertificateSecurityError(

1881

"Verify failed")

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1882

2308

# New buffer for the fingerprint

1883

2309

buf = ctypes.create_string_buffer(20)

1884

2310

buf_len = ctypes.c_size_t()

1885

2311

# Get the fingerprint from the certificate into the buffer

1886

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1887

crt, ctypes.byref(buf), ctypes.byref(buf_len))

2312

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2313

ctypes.byref(buf_len))

1888

2314

# Deinit the certificate

1889

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1890

2316

# Convert the buffer to a Python bytestring

1891

2317

fpr = ctypes.string_at(buf, buf_len.value)

1892

2318

# Convert the bytestring to hexadecimal notation

2036

2462

gnutls_priority GnuTLS priority string

2037

2463

use_dbus: Boolean; to emit D-Bus signals or not

2038

2464

2039

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

2040

2466

"""

2041

2467

2042

2468

def __init__(self, server_address, RequestHandlerClass,

2067

2493

2068

2494

def add_pipe(self, parent_pipe, proc):

2069

2495

# Call "handle_ipc" for both data and EOF events

2070

gobject.io_add_watch(

2496

GObject.io_add_watch(

2071

2497

parent_pipe.fileno(),

2072

gobject.IO_IN | gobject.IO_HUP,

2498

GObject.IO_IN | GObject.IO_HUP,

2073

2499

functools.partial(self.handle_ipc,

2074

2500

parent_pipe = parent_pipe,

2075

2501

proc = proc))

2079

2505

proc = None,

2080

2506

client_object=None):

2081

2507

# error, or the other end of multiprocessing.Pipe has closed

2082

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2508

if condition & (GObject.IO_ERR | GObject.IO_HUP):

2083

2509

# Wait for other process to exit

2084

2510

proc.join()

2085

2511

return False

2106

2532

parent_pipe.send(False)

2107

2533

return False

2108

2534

2109

gobject.io_add_watch(

2535

GObject.io_add_watch(

2110

2536

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2537

GObject.IO_IN | GObject.IO_HUP,

2112

2538

functools.partial(self.handle_ipc,

2113

2539

parent_pipe = parent_pipe,

2114

2540

proc = proc,

2128

2554

2129

2555

if command == 'getattr':

2130

2556

attrname = request[1]

2131

if callable(client_object.__getattribute__(attrname)):

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2132

2559

parent_pipe.send(('function', ))

2133

2560

else:

2134

2561

parent_pipe.send((

2169

2596

# avoid excessive use of external libraries.

2170

2597

2171

2598

# New type for defining tokens, syntax, and semantics all-in-one

2172

Token = collections.namedtuple("Token",

2173

("regexp", # To match token; if

2174

# "value" is not None,

2175

# must have a "group"

2176

# containing digits

2177

"value", # datetime.timedelta or

2178

# None

2179

"followers")) # Tokens valid after

2180

# this token

2181

2599

Token = collections.namedtuple("Token", (

2182

2600

"regexp", # To match token; if "value" is not None, must have

2183

2601

# a "group" containing digits

2218

2636

# Define starting values

2219

2637

value = datetime.timedelta() # Value so far

2220

2638

found_token = None

2221

followers = frozenset((token_duration,)) # Following valid tokens

2639

followers = frozenset((token_duration, )) # Following valid tokens

2222

2640

s = duration # String left to parse

2223

2641

# Loop until end token is found

2224

2642

while found_token is not token_end:

2241

2659

break

2242

2660

else:

2243

2661

# No currently valid tokens were found

2244

raise ValueError("Invalid RFC 3339 duration")

2662

raise ValueError("Invalid RFC 3339 duration: {!r}"

2663

.format(duration))

2245

2664

# End token found

2246

2665

return value

2247

2666

2380

2799

"debug": "False",

2381

2800

"priority":

2382

2801

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2383

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2802

":+SIGN-DSA-SHA256",

2384

2803

"servicename": "Mandos",

2385

2804

"use_dbus": "True",

2386

2805

"use_ipv6": "True",

2498

2917

pidfilename = "/var/run/mandos.pid"

2499

2918

pidfile = None

2500

2919

try:

2501

pidfile = open(pidfilename, "w")

2920

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2502

2921

except IOError as e:

2503

2922

logger.error("Could not open file %r", pidfilename,

2504

2923

exc_info=e)

2505

2924

2506

for name in ("_mandos", "mandos", "nobody"):

2925

for name, group in (("_mandos", "_mandos"),

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2507

2928

try:

2508

2929

uid = pwd.getpwnam(name).pw_uid

2509

gid = pwd.getpwnam(name).pw_gid

2930

gid = pwd.getpwnam(group).pw_gid

2510

2931

break

2511

2932

except KeyError:

2512

2933

continue

2516

2937

try:

2517

2938

os.setgid(gid)

2518

2939

os.setuid(uid)

2940

if debug:

2941

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2942

gid))

2519

2943

except OSError as error:

2944

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2945

.format(uid, gid, os.strerror(error.errno)))

2520

2946

if error.errno != errno.EPERM:

2521

2947

raise

2522

2948

2525

2951

2526

2952

# "Use a log level over 10 to enable all debugging options."

2527

2953

# - GnuTLS manual

2528

gnutls.library.functions.gnutls_global_set_log_level(11)

2954

gnutls.global_set_log_level(11)

2529

2955

2530

@gnutls.library.types.gnutls_log_func

2956

@gnutls.log_func

2531

2957

def debug_gnutls(level, string):

2532

2958

logger.debug("GnuTLS: %s", string[:-1])

2533

2959

2534

gnutls.library.functions.gnutls_global_set_log_function(

2535

debug_gnutls)

2960

gnutls.global_set_log_function(debug_gnutls)

2536

2961

2537

2962

# Redirect stdin so all checkers get /dev/null

2538

2963

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2545

2970

# Close all input and output, do double fork, etc.

2546

2971

daemon()

2547

2972

2548

# multiprocessing will use threads, so before we use gobject we

2549

# need to inform gobject that threads will be used.

2550

gobject.threads_init()

2973

# multiprocessing will use threads, so before we use GObject we

2974

# need to inform GObject that threads will be used.

2975

GObject.threads_init()

2551

2976

2552

2977

global main_loop

2553

2978

# From the Avahi example code

2554

2979

DBusGMainLoop(set_as_default=True)

2555

main_loop = gobject.MainLoop()

2980

main_loop = GObject.MainLoop()

2556

2981

bus = dbus.SystemBus()

2557

2982

# End of Avahi example code

2558

2983

if use_dbus:

2563

2988

old_bus_name = dbus.service.BusName(

2564

2989

"se.bsnet.fukt.Mandos", bus,

2565

2990

do_not_queue=True)

2566

except dbus.exceptions.NameExistsException as e:

2991

except dbus.exceptions.DBusException as e:

2567

2992

logger.error("Disabling D-Bus:", exc_info=e)

2568

2993

use_dbus = False

2569

2994

server_settings["use_dbus"] = False

2642

3067

pass

2643

3068

2644

3069

# Clients who has passed its expire date can still be

2645

# enabled if its last checker was successful. Clients

3070

# enabled if its last checker was successful. A Client

2646

3071

# whose checker succeeded before we stored its state is

2647

3072

# assumed to have successfully run all checkers during

2648

3073

# downtime.

2700

3125

2701

3126

if not foreground:

2702

3127

if pidfile is not None:

3128

pid = os.getpid()

2703

3129

try:

2704

3130

with pidfile:

2705

pid = os.getpid()

2706

pidfile.write("{}\n".format(pid).encode("utf-8"))

3131

print(pid, file=pidfile)

2707

3132

except IOError:

2708

3133

logger.error("Could not write to file %r with PID %d",

2709

3134

pidfilename, pid)

2717

3142

2718

3143

@alternate_dbus_interfaces(

2719

3144

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2720

class MandosDBusService(DBusObjectWithProperties):

3145

class MandosDBusService(DBusObjectWithObjectManager):

2721

3146

"""A D-Bus proxy object"""

2722

3147

2723

3148

def __init__(self):

2725

3150

2726

3151

_interface = "se.recompile.Mandos"

2727

3152

2728

@dbus_interface_annotations(_interface)

2729

def _foo(self):

2730

return {

2731

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2732

"false" }

2733

2734

3153

@dbus.service.signal(_interface, signature="o")

2735

3154

def ClientAdded(self, objpath):

2736

3155

"D-Bus signal"

2741

3160

"D-Bus signal"

2742

3161

pass

2743

3162

3163

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3164

"true"})

2744

3165

@dbus.service.signal(_interface, signature="os")

2745

3166

def ClientRemoved(self, objpath, name):

2746

3167

"D-Bus signal"

2747

3168

pass

2748

3169

3170

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3171

"true"})

2749

3172

@dbus.service.method(_interface, out_signature="ao")

2750

3173

def GetAllClients(self):

2751

3174

"D-Bus method"

2752

3175

return dbus.Array(c.dbus_object_path for c in

2753

3176

tcp_server.clients.itervalues())

2754

3177

3178

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3179

"true"})

2755

3180

@dbus.service.method(_interface,

2756

3181

out_signature="a{oa{sv}}")

2757

3182

def GetAllClientsWithProperties(self):

2758

3183

"D-Bus method"

2759

3184

return dbus.Dictionary(

2760

{ c.dbus_object_path: c.GetAll("")

3185

{ c.dbus_object_path: c.GetAll(

3186

"se.recompile.Mandos.Client")

2761

3187

for c in tcp_server.clients.itervalues() },

2762

3188

signature="oa{sv}")

2763

3189

2768

3194

if c.dbus_object_path == object_path:

2769

3195

del tcp_server.clients[c.name]

2770

3196

c.remove_from_connection()

2771

# Don't signal anything except ClientRemoved

3197

# Don't signal the disabling

2772

3198

c.disable(quiet=True)

2773

# Emit D-Bus signal

2774

self.ClientRemoved(object_path, c.name)

3199

# Emit D-Bus signal for removal

3200

self.client_removed_signal(c)

2775

3201

return

2776

3202

raise KeyError(object_path)

2777

3203

2778

3204

del _interface

3205

3206

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3207

out_signature = "a{oa{sa{sv}}}")

3208

def GetManagedObjects(self):

3209

"""D-Bus method"""

3210

return dbus.Dictionary(

3211

{ client.dbus_object_path:

3212

dbus.Dictionary(

3213

{ interface: client.GetAll(interface)

3214

for interface in

3215

client._get_all_interface_names()})

3216

for client in tcp_server.clients.values()})

3217

3218

def client_added_signal(self, client):

3219

"""Send the new standard signal and the old signal"""

3220

if use_dbus:

3221

# New standard signal

3222

self.InterfacesAdded(

3223

client.dbus_object_path,

3224

dbus.Dictionary(

3225

{ interface: client.GetAll(interface)

3226

for interface in

3227

client._get_all_interface_names()}))

3228

# Old signal

3229

self.ClientAdded(client.dbus_object_path)

3230

3231

def client_removed_signal(self, client):

3232

"""Send the new standard signal and the old signal"""

3233

if use_dbus:

3234

# New standard signal

3235

self.InterfacesRemoved(

3236

client.dbus_object_path,

3237

client._get_all_interface_names())

3238

# Old signal

3239

self.ClientRemoved(client.dbus_object_path,

3240

client.name)

2779

3241

2780

3242

mandos_dbus_service = MandosDBusService()

2781

3243

2846

3308

name, client = tcp_server.clients.popitem()

2847

3309

if use_dbus:

2848

3310

client.remove_from_connection()

2849

# Don't signal anything except ClientRemoved

3311

# Don't signal the disabling

2850

3312

client.disable(quiet=True)

3313

# Emit D-Bus signal for removal

2851

3314

if use_dbus:

2852

# Emit D-Bus signal

2853

mandos_dbus_service.ClientRemoved(

2854

client.dbus_object_path, client.name)

3315

mandos_dbus_service.client_removed_signal(client)

2855

3316

client_settings.clear()

2856

3317

2857

3318

atexit.register(cleanup)

2858

3319

2859

3320

for client in tcp_server.clients.itervalues():

2860

3321

if use_dbus:

2861

# Emit D-Bus signal

2862

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3322

# Emit D-Bus signal for adding

3323

mandos_dbus_service.client_added_signal(client)

2863

3324

# Need to initiate checking of clients

2864

3325

if client.enabled:

2865

3326

client.init_checker()

2891

3352

sys.exit(1)

2892

3353

# End of Avahi example code

2893

3354

2894

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

3355

GObject.io_add_watch(tcp_server.fileno(), GObject.IO_IN,

2895

3356

lambda *args, **kwargs:

2896

3357

(tcp_server.handle_request

2897

3358

(*args[2:], **kwargs) or True))